chore: reduce docker image size

Dockerfile

@@ -1,15 +1,22 @@
-FROM python:3.11
+FROM python:3.11 AS deps
+WORKDIR /tmp
+RUN mkdir /deps
+ADD requirements.txt ./
+RUN pip install -U pip setuptools wheel && \
+    pip wheel -r requirements.txt --no-cache-dir --wheel-dir /deps && \
+    rm -f /deps/setuptools-*.whl
+
+FROM python:3.11-slim
 WORKDIR /usr/src/app
-COPY requirements.txt /usr/src/app/
-RUN groupadd -g 998 -r kompassi && useradd -r -g kompassi -u 998 kompassi && \
-    pip install -U pip setuptools wheel && \
-    pip install --no-cache-dir -r requirements.txt
-COPY . /usr/src/app
+RUN groupadd -g 998 -r kompassi && useradd -r -g kompassi -u 998 kompassi && apt-get update && apt-get -y install libpq5 && rm -rf /var/lib/apt/lists
+ADD requirements.txt ./
+RUN --mount=type=bind,from=deps,source=/deps,target=/deps \
+    pip install --no-cache-dir --no-index --find-links /deps /deps/*.whl
+ADD . .
 RUN env DEBUG=1 python manage.py collectstatic --noinput && \
     env DEBUG=1 python manage.py kompassi_i18n -ac && \
     python -m compileall -q . && \
     chmod 755 manage.py scripts/*.sh
 USER kompassi
-EXPOSE 8000
 ENTRYPOINT ["/usr/src/app/scripts/docker-entrypoint.sh"]
 CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]

requirements.in

@@ -1,5 +1,5 @@
-git+https://github.com/kcsry/lippukala.git
-git+https://github.com/kcsry/paikkala.git
+lippukala @ https://github.com/kcsry/lippukala/archive/fd6f55f499b12062887f6c78ff2c6749df8ba5cc.zip
+paikkala @ https://github.com/kcsry/paikkala/archive/205a72f3f6a1b49c7886f1062b600f42a8ebb127.zip
 Babel
 black
 bleach
@@ -32,7 +32,7 @@ paramiko
 passlib
 phonenumberslite
 Pillow
-psycopg
+psycopg[c]
 pypugjs
 pytest-django
 python-dateutil

requirements.txt

@@ -154,7 +154,7 @@ jwcrypto==1.4.2
     # via django-oauth-toolkit
 kombu==5.2.4
     # via celery
-lippukala @ git+https://github.com/kcsry/lippukala.git
+lippukala @ https://github.com/kcsry/lippukala/archive/fd6f55f499b12062887f6c78ff2c6749df8ba5cc.zip
     # via -r requirements.in
 markdown==3.4.3
     # via -r requirements.in
@@ -173,7 +173,7 @@ packaging==23.1
     #   black
     #   deprecation
     #   pytest
-paikkala @ git+https://github.com/kcsry/paikkala.git
+paikkala @ https://github.com/kcsry/paikkala/archive/205a72f3f6a1b49c7886f1062b600f42a8ebb127.zip
     # via -r requirements.in
 paramiko==3.1.0
     # via -r requirements.in
@@ -201,8 +201,10 @@ prompt-toolkit==3.0.38
     # via
     #   click-repl
     #   ipython
-psycopg==3.1.8
+psycopg[c]==3.1.8
     # via -r requirements.in
+psycopg-c==3.1.8
+    # via psycopg
 ptyprocess==0.7.0
     # via pexpect
 pure-eval==0.2.2