Optimize build caching

Before this commit, if docker-entrypoint or any file in mailman-web changed, the Docker build cache would not be used, so the install of dependencies would run again, uselessly

web/Dockerfile

@@ -1,10 +1,6 @@
 # syntax = docker/dockerfile:1.3
 FROM alpine:3.18.4
 
-# Add needed files for uwsgi server + settings for django
-COPY mailman-web /opt/mailman-web
-# Add startup script to container
-COPY docker-entrypoint.sh /usr/local/bin/
 # Add requirements file.
 COPY requirements.txt /tmp/
 
@@ -34,8 +30,14 @@ RUN --mount=type=cache,target=/root/.cache \
 		tzdata \
 	&& apk del .build-deps \
 	&& addgroup -S mailman \
-	&& adduser -S -G mailman mailman \
-	&& chown -R mailman /opt/mailman-web/ \
+	&& adduser -S -G mailman mailman
+
+# Add needed files for uwsgi server + settings for django
+COPY mailman-web /opt/mailman-web
+# Add startup script to container
+COPY docker-entrypoint.sh /usr/local/bin/
+
+RUN chown -R mailman /opt/mailman-web/ \
 	&& chmod u+x /opt/mailman-web/manage.py
 
 WORKDIR /opt/mailman-web

web/Dockerfile.dev

@@ -1,11 +1,6 @@
 # syntax = docker/dockerfile:1.3
 FROM alpine:3.18.4
 
-# Add needed files for uwsgi server + settings for django
-COPY mailman-web /opt/mailman-web
-# Add startup script to container
-COPY docker-entrypoint.sh /usr/local/bin/
-
 ARG POSTORIUS_REF
 ARG HYPERKITTY_REF
 ARG DJ_MM3_REF
@@ -42,9 +37,15 @@ RUN --mount=type=cache,target=/root/.cache \
        git+https://gitlab.com/mailman/django-mailman3 \
     && apk del .build-deps \
     && addgroup -S mailman \
-    && adduser -S -G mailman mailman \
-    && chown -R mailman /opt/mailman-web/ \
-    && chmod u+x /opt/mailman-web/manage.py
+    && adduser -S -G mailman mailman
+
+# Add needed files for uwsgi server + settings for django
+COPY mailman-web /opt/mailman-web
+# Add startup script to container
+COPY docker-entrypoint.sh /usr/local/bin/
+
+RUN chown -R mailman /opt/mailman-web/ \
+	&& chmod u+x /opt/mailman-web/manage.py
 
 WORKDIR /opt/mailman-web