Update to Python 3.8

Currently, the dev image is broken due to typed-ast being present and
requiring GCC and Python.h. Supposedly that package will be made
optional by flake8-annotations in a later update.

* Use the Python image for the base image's first stage to save
  downloading a separate alpine image.

3 files changed, 73 insertions, 68 deletions

diff --git a/Pipfile b/Pipfile
index 18e4855..08c18ff 100644
--- a/Pipfile
+++ b/Pipfile
@@ -25,7 +25,7 @@ flake8-quotes = "~= 2.1"
 unittest-xml-reporting = ">= 2.5.1, == 2.*"
 
 [requires]
-python_version = "3.7"
+python_version = "3.8"
 
 [scripts]
 lint = "flake8"
diff --git a/Pipfile.lock b/Pipfile.lock
index 0a4147f..8826a6d 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,11 +1,11 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "1ad99d8fc7a9d131a21df14de468fa708f62bfd2e501cfc40fb76375f255fa13"
+            "sha256": "896d7b2ccf166ecdb2806315041f2e0fc3cf52f5c841d2544e4adf42886438be"
         },
         "pipfile-spec": 6,
         "requires": {
-            "python_version": "3.7"
+            "python_version": "3.8"
         },
         "sources": [
             {
@@ -18,10 +18,10 @@
     "default": {
         "attrs": {
             "hashes": [
-                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
-                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
+                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
+                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
             ],
-            "version": "==19.1.0"
+            "version": "==19.3.0"
         },
         "falcon": {
             "hashes": [
@@ -45,32 +45,32 @@
         },
         "gunicorn": {
             "hashes": [
-                "sha256:aa8e0b40b4157b36a5df5e599f45c9c76d6af43845ba3b3b0efe2c70473c2471",
-                "sha256:fa2662097c66f920f53f70621c6c58ca4a3c4d3434205e608e121b5b3b71f4f3"
+                "sha256:c3930fe8de6778ab5ea716cab432ae6335fa9f03b3f2c3e02529214c476f4bcb",
+                "sha256:f9de24e358b841567063629cd0a656b26792a41e23a24d0dcb40224fc3940081"
             ],
             "index": "pypi",
-            "version": "==19.9.0"
+            "version": "==19.10.0"
         },
         "jsonschema": {
             "hashes": [
-                "sha256:5f9c0a719ca2ce14c5de2fd350a64fd2d13e8539db29836a86adc990bb1a068f",
-                "sha256:8d4a2b7b6c2237e0199c8ea1a6d3e05bf118e289ae2b9d7ba444182a2959560d"
+                "sha256:4e5b3cf8216f577bee9ce139cbe72eca3ea4f292ec60928ff24758ce626cd163",
+                "sha256:c8a85b28d377cc7737e46e2d9f2b4f44ee3c0e1deac6bf46ddefc7187d30797a"
             ],
             "index": "pypi",
-            "version": "==3.0.2"
+            "version": "==3.2.0"
         },
         "pyrsistent": {
             "hashes": [
-                "sha256:34b47fa169d6006b32e99d4b3c4031f155e6e68ebcc107d6454852e8e0ee6533"
+                "sha256:f3b280d030afb652f79d67c5586157c5c1355c9a58dfc7940566e28d28f3df1b"
             ],
-            "version": "==0.15.4"
+            "version": "==0.15.6"
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
+                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
             ],
-            "version": "==1.12.0"
+            "version": "==1.13.0"
         }
     },
     "develop": {
@@ -83,10 +83,10 @@
         },
         "attrs": {
             "hashes": [
-                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
-                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
+                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
+                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
             ],
-            "version": "==19.1.0"
+            "version": "==19.3.0"
         },
         "cfgv": {
             "hashes": [
@@ -142,19 +142,19 @@
         },
         "flake8": {
             "hashes": [
-                "sha256:19241c1cbc971b9962473e4438a2ca19749a7dd002dd1a946eaba171b4114548",
-                "sha256:8e9dfa3cecb2400b3738a42c54c3043e821682b9c840b0448c0503f781130696"
+                "sha256:45681a117ecc81e870cbf1262835ae4af5e7a8b08e40b944a8a6e6b895914cfb",
+                "sha256:49356e766643ad15072a789a20915d3c91dc89fd313ccd71802303fd67e4deca"
             ],
             "index": "pypi",
-            "version": "==3.7.8"
+            "version": "==3.7.9"
         },
         "flake8-annotations": {
             "hashes": [
-                "sha256:1309f2bc9853a2d77d578b089d331b0b832b40c97932641e136e1b49d3650c82",
-                "sha256:3ecdd27054c3eed6484139025698465e3c9f4e68dbd5043d0204fcb2550ee27b"
+                "sha256:6ac7ca1e706307686b60af8043ff1db31dc2cfc1233c8210d67a3d9b8f364736",
+                "sha256:b51131007000d67217608fa028a35ff80aa400b474e5972f1f99c2cf9d26bd2e"
             ],
             "index": "pypi",
-            "version": "==1.0.0"
+            "version": "==1.1.0"
         },
         "flake8-bugbear": {
             "hashes": [
@@ -166,11 +166,11 @@
         },
         "flake8-docstrings": {
             "hashes": [
-                "sha256:1666dd069c9c457ee57e80af3c1a6b37b00cc1801c6fde88e455131bb2e186cd",
-                "sha256:9c0db5a79a1affd70fdf53b8765c8a26bf968e59e0252d7f2fc546b41c0cda06"
+                "sha256:3d5a31c7ec6b7367ea6506a87ec293b94a0a46c0bce2bb4975b7f1d09b6f3717",
+                "sha256:a256ba91bc52307bef1de59e2a009c3cf61c3d0952dbe035d6ff7208940c2edc"
             ],
             "index": "pypi",
-            "version": "==1.4.0"
+            "version": "==1.5.0"
         },
         "flake8-formatter-junit-xml": {
             "hashes": [
@@ -190,10 +190,10 @@
         },
         "flake8-quotes": {
             "hashes": [
-                "sha256:5dbaf668887873f28346fb87943d6da2e4b9f77ce9f2169cff21764a0a4934ed"
+                "sha256:11a15d30c92ca5f04c2791bd7019cf62b6f9d3053eb050d02a135557eb118bfc"
             ],
             "index": "pypi",
-            "version": "==2.1.0"
+            "version": "==2.1.1"
         },
         "flake8-string-format": {
             "hashes": [
@@ -225,13 +225,6 @@
             ],
             "version": "==1.4.7"
         },
-        "importlib-metadata": {
-            "hashes": [
-                "sha256:aa18d7378b00b40847790e7c27e11673d7fed219354109d0e7b9e5b25dc3ad26",
-                "sha256:d5f18a79777f3aa179c145737780282e27b508fc8fd688cb17c7a813e8bd39af"
-            ],
-            "version": "==0.23"
-        },
         "junit-xml": {
             "hashes": [
                 "sha256:602f1c480a19d64edb452bf7632f76b5f2cb92c1938c6e071dcda8ff9541dc21"
@@ -245,13 +238,6 @@
             ],
             "version": "==0.6.1"
         },
-        "more-itertools": {
-            "hashes": [
-                "sha256:409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832",
-                "sha256:92b8c4b06dac4f0611c0729b2f2ede52b2e1bac1ab48f089c7ddc12e26bb60c4"
-            ],
-            "version": "==7.2.0"
-        },
         "nodeenv": {
             "hashes": [
                 "sha256:ad8259494cf1c9034539f6cced78a1da4840a4b157e23640bc4a0c0546b0cb7a"
@@ -260,11 +246,11 @@
         },
         "pre-commit": {
             "hashes": [
-                "sha256:1d3c0587bda7c4e537a46c27f2c84aa006acc18facf9970bf947df596ce91f3f",
-                "sha256:fa78ff96e8e9ac94c748388597693f18b041a181c94a4f039ad20f45287ba44a"
+                "sha256:9f152687127ec90642a2cc3e4d9e1e6240c4eb153615cb02aa1ad41d331cbb6e",
+                "sha256:c2e4810d2d3102d354947907514a78c5d30424d299dc0fe48f5aa049826e9b50"
             ],
             "index": "pypi",
-            "version": "==1.18.3"
+            "version": "==1.20.0"
         },
         "pycodestyle": {
             "hashes": [
@@ -308,16 +294,17 @@
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:1f1b7d42e254082a9db6279deae68afb421ceba6158efa6131de7b3003ee93fd",
+                "sha256:30f610279e8b2578cab6db20741130331735c781b56053c59c4076da27f06b66"
             ],
-            "version": "==1.12.0"
+            "version": "==1.13.0"
         },
         "snowballstemmer": {
             "hashes": [
-                "sha256:713e53b79cbcf97bc5245a06080a33d54a77e7cce2f789c835a143bcdb5c033e"
+                "sha256:209f257d7533fdb3cb73bdbd24f436239ca3b2fa67d56f6ff88e86be08cc5ef0",
+                "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"
             ],
-            "version": "==1.9.1"
+            "version": "==2.0.0"
         },
         "toml": {
             "hashes": [
@@ -326,27 +313,45 @@
             ],
             "version": "==0.10.0"
         },
+        "typed-ast": {
+            "hashes": [
+                "sha256:1170afa46a3799e18b4c977777ce137bb53c7485379d9706af8a59f2ea1aa161",
+                "sha256:18511a0b3e7922276346bcb47e2ef9f38fb90fd31cb9223eed42c85d1312344e",
+                "sha256:262c247a82d005e43b5b7f69aff746370538e176131c32dda9cb0f324d27141e",
+                "sha256:2b907eb046d049bcd9892e3076c7a6456c93a25bebfe554e931620c90e6a25b0",
+                "sha256:354c16e5babd09f5cb0ee000d54cfa38401d8b8891eefa878ac772f827181a3c",
+                "sha256:48e5b1e71f25cfdef98b013263a88d7145879fbb2d5185f2a0c79fa7ebbeae47",
+                "sha256:4e0b70c6fc4d010f8107726af5fd37921b666f5b31d9331f0bd24ad9a088e631",
+                "sha256:630968c5cdee51a11c05a30453f8cd65e0cc1d2ad0d9192819df9978984529f4",
+                "sha256:66480f95b8167c9c5c5c87f32cf437d585937970f3fc24386f313a4c97b44e34",
+                "sha256:71211d26ffd12d63a83e079ff258ac9d56a1376a25bc80b1cdcdf601b855b90b",
+                "sha256:7954560051331d003b4e2b3eb822d9dd2e376fa4f6d98fee32f452f52dd6ebb2",
+                "sha256:838997f4310012cf2e1ad3803bce2f3402e9ffb71ded61b5ee22617b3a7f6b6e",
+                "sha256:95bd11af7eafc16e829af2d3df510cecfd4387f6453355188342c3e79a2ec87a",
+                "sha256:bc6c7d3fa1325a0c6613512a093bc2a2a15aeec350451cbdf9e1d4bffe3e3233",
+                "sha256:cc34a6f5b426748a507dd5d1de4c1978f2eb5626d51326e43280941206c209e1",
+                "sha256:d755f03c1e4a51e9b24d899561fec4ccaf51f210d52abdf8c07ee2849b212a36",
+                "sha256:d7c45933b1bdfaf9f36c579671fec15d25b06c8398f113dab64c18ed1adda01d",
+                "sha256:d896919306dd0aa22d0132f62a1b78d11aaf4c9fc5b3410d3c666b818191630a",
+                "sha256:fdc1c9bbf79510b76408840e009ed65958feba92a88833cdceecff93ae8fff66",
+                "sha256:ffde2fbfad571af120fcbfbbc61c72469e72f550d676c3342492a9dfdefb8f12"
+            ],
+            "version": "==1.4.0"
+        },
         "unittest-xml-reporting": {
             "hashes": [
-                "sha256:140982e4b58e4052d9ecb775525b246a96bfc1fc26097806e05ea06e9166dd6c",
-                "sha256:d1fbc7a1b6c6680ccfe75b5e9701e5431c646970de049e687b4bb35ba4325d72"
+                "sha256:358bbdaf24a26d904cc1c26ef3078bca7fc81541e0a54c8961693cc96a6f35e0",
+                "sha256:9d28ddf6524cf0ff9293f61bd12e792de298f8561a5c945acea63fb437789e0e"
             ],
             "index": "pypi",
-            "version": "==2.5.1"
+            "version": "==2.5.2"
         },
         "virtualenv": {
             "hashes": [
-                "sha256:680af46846662bb38c5504b78bad9ed9e4f3ba2d54f54ba42494fdf94337fe30",
-                "sha256:f78d81b62d3147396ac33fc9d77579ddc42cc2a98dd9ea38886f616b33bc7fb2"
-            ],
-            "version": "==16.7.5"
-        },
-        "zipp": {
-            "hashes": [
-                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
-                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
+                "sha256:116655188441670978117d0ebb6451eb6a7526f9ae0796cc0dee6bd7356909b0",
+                "sha256:b57776b44f91511866594e477dd10e76a6eb44439cdd7f06dcd30ba4c5bd854f"
             ],
-            "version": "==0.6.0"
+            "version": "==16.7.8"
         }
     }
 }
diff --git a/docker/base.Dockerfile b/docker/base.Dockerfile
index 1edff49..7334cf4 100644
--- a/docker/base.Dockerfile
+++ b/docker/base.Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.10 as builder
+FROM python:3.8.0-alpine3.10 as builder
 RUN apk add --no-cache --update  \
         bison~=3.3 \
         bsd-compat-headers~=0.7 \
@@ -16,7 +16,7 @@ RUN git clone https://github.com/google/nsjail.git /nsjail \
 WORKDIR /nsjail
 RUN make
 
-FROM python:3.7.4-alpine3.10
+FROM python:3.8.0-alpine3.10
 ENV PIP_NO_CACHE_DIR=false
 RUN apk add --no-cache --update \
         libnl3~=3.4 \