Smaller docker build

Dockerfile

-FROM python:3.8-slim
-MAINTAINER RESIF DC <resif-dc@univ-grenoble-alpes.fr>
+FROM python:3.9-slim AS build
+RUN apt-get update && apt-get install -y python3-dev libpq-dev build-essential
+COPY requirements.txt /
+RUN pip3 install --no-cache-dir -r /requirements.txt
+RUN pip3 install --no-cache-dir gunicorn
 
+FROM python:3.9-slim
+MAINTAINER RESIF DC <resif-dc@univ-grenoble-alpes.fr>
 RUN apt-get update && apt-get -y install gnupg
-
 COPY setup/gpghome /gpghome
-
-RUN pip3 install --no-cache-dir gunicorn
-COPY requirements.txt /
-RUN pip3 install --no-cache-dir -r /requirements.txt
+COPY --from=build /usr/local/lib/python3.9/site-packages/ /usr/local/lib/python3.9/site-packages
 COPY eidawsauth/ /app/
 WORKDIR /app
 CMD ["gunicorn", "-b", "0.0.0.0:8000", "eidawsauth"]

Pipfile

@@ -8,7 +8,7 @@ verify_ssl = true
 [packages]
 click = "==7.1.1"
 itsdangerous = "==1.1.0"
-psycopg2-binary = "*"
+psycopg2 = "*"
 python-gnupg = "==0.4.5"
 Flask = "==1.1.1"
 Jinja2 = "==2.11.1"

Pipfile.lock

 {
     "_meta": {
         "hash": {
-            "sha256": "49ade479f3c3647a3a7de684233b91eee7764a20e2ae770612d93c479d91aaaf"
+            "sha256": "01467160d3ee226ac73489963718e4e58340480087fe5ca78210d2e09cae35ef"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -110,6 +110,27 @@
             "index": "pypi",
             "version": "==1.1.1"
         },
+        "psycopg2": {
+            "hashes": [
+                "sha256:00195b5f6832dbf2876b8bf77f12bdce648224c89c880719c745b90515233301",
+                "sha256:068115e13c70dc5982dfc00c5d70437fe37c014c808acce119b5448361c03725",
+                "sha256:26e7fd115a6db75267b325de0fba089b911a4a12ebd3d0b5e7acb7028bc46821",
+                "sha256:2c93d4d16933fea5bbacbe1aaf8fa8c1348740b2e50b3735d1b0bf8154cbf0f3",
+                "sha256:56007a226b8e95aa980ada7abdea6b40b75ce62a433bd27cec7a8178d57f4051",
+                "sha256:56fee7f818d032f802b8eed81ef0c1232b8b42390df189cab9cfa87573fe52c5",
+                "sha256:6a3d9efb6f36f1fe6aa8dbb5af55e067db802502c55a9defa47c5a1dad41df84",
+                "sha256:a49833abfdede8985ba3f3ec641f771cca215479f41523e99dace96d5b8cce2a",
+                "sha256:ad2fe8a37be669082e61fb001c185ffb58867fdbb3e7a6b0b0d2ffe232353a3e",
+                "sha256:b8cae8b2f022efa1f011cc753adb9cbadfa5a184431d09b273fb49b4167561ad",
+                "sha256:d160744652e81c80627a909a0e808f3c6653a40af435744de037e3172cf277f5",
+                "sha256:d5062ae50b222da28253059880a871dc87e099c25cb68acf613d9d227413d6f7",
+                "sha256:f22ea9b67aea4f4a1718300908a2fb62b3e4276cf00bd829a97ab5894af42ea3",
+                "sha256:f974c96fca34ae9e4f49839ba6b78addf0346777b46c4da27a7bf54f48d3057d",
+                "sha256:fb23f6c71107c37fd667cb4ea363ddeb936b348bbd6449278eb92c189699f543"
+            ],
+            "index": "pypi",
+            "version": "==2.8.6"
+        },
         "psycopg2-binary": {
             "hashes": [
                 "sha256:0deac2af1a587ae12836aa07970f5cb91964f05a7c6cdb69d8425ff4c15d4e2c",
@@ -148,7 +169,7 @@
                 "sha256:ee69dad2c7155756ad114c02db06002f4cded41132cc51378e57aad79cc8e4f4",
                 "sha256:f5ab93a2cb2d8338b1674be43b442a7f544a0971da062a5da774ed40587f18f5"
             ],
-            "index": "pypi",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.8.6"
         },
         "python-gnupg": {

requirements.txt

@@ -12,6 +12,7 @@ flask==1.1.1
 itsdangerous==1.1.0
 jinja2==2.11.1
 markupsafe==1.1.1
-psycopg2-binary==2.8.6
+psycopg2-binary==2.8.6; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+psycopg2==2.8.6
 python-gnupg==0.4.5
 werkzeug==1.0.0