fix: set Cache-Control header to no-cache io. must-revalidate for datalayer

"Cache-Control: must-revalidate" without max-age is confusing. Firefox
keeps caching the page, while Chrome doesn't.

Dockerfile

@@ -21,12 +21,14 @@ RUN set -eux && \
     apt-get autoremove --purge -y && \
     rm -rf /var/lib/apt/lists/*
 
+RUN sed -i 's/must_revalidate/no_cache/' /srv/umap/venv/lib/python3.9/site-packages/umap/urls.py
+
 ADD umap.conf /etc/umap/umap.conf
 ADD uwsgi.ini /srv/umap/uwsgi.ini
 ADD drop-privileges.sh /srv/umap/drop-privileges.sh
 ADD docker-entrypoint.sh /srv/umap/docker-entrypoint.sh
 
-EXPOSE 8000/tcp
+EXPOSE 80/tcp
 
 # Add Tini
 ENV TINI_VERSION v0.14.0

docker-compose.yml

@@ -1,31 +1,31 @@
 version: '3'
 services:
-  db:
+  postgis:
     image: postgis/postgis:12-3.3
     environment:
       - POSTGRES_HOST_AUTH_METHOD=trust
     volumes:
-      - db:/var/lib/postgresql/data
+      - postgis:/var/lib/postgresql/data
 
   redis:
     image: redis:latest
 
-  app:
+  umap:
     image: pommib/umap:1.2.3
     ports:
-      - "8000:8000"
+      - "8000:80"
     environment:
-      - DATABASE_URL=postgis://postgres@db/postgres
+      - DATABASE_URL=postgis://postgres@postgis/postgres
       - REDIS_URL=redis://redis:6379/0
       - SECRET_KEY=some-long-and-weirdly-unrandom-secret-key
       - ALLOWED_HOSTS=*
       - SITE_URL=https://umap.somewhere.nl/
       - LEAFLET_STORAGE_ALLOW_ANONYMOUS=True
     depends_on:
-      - db
+      - postgis
       - redis
         #    command: "tail -F anything"
 
 volumes:
-  db:
+  postgis:
   uploads:

uwsgi.ini

@@ -2,7 +2,7 @@
 uid             = umap
 gid             = users
 enable-threads  = true
-http-socket     = :8000
+http-socket     = :80
 
 # Python related settings
 # the base directory (full path)