Fix error handling when building image

Apparently, we managed to publish an image without working aiohttp
because of this.

Partially a regression from 5d7183a.

.github/workflows/main.yaml

@@ -50,29 +50,6 @@ jobs:
         run: |
           python -m flake8 snikket_web
 
-  translation-check:
-    runs-on: ubuntu-latest
-
-    name: 'lint: i18n'
-
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-        with:
-          python-version: '3.9'
-      - name: Install
-        run: |
-          set -euo pipefail
-          pip install flask-babel
-      - name: Linting
-        run: |
-          sed -ri '/^"POT-Creation-Date: /d' snikket_web/translations/messages.pot
-          git add snikket_web/translations/messages.pot
-          make extract_translations
-          sed -ri '/^"POT-Creation-Date: /d' snikket_web/translations/messages.pot
-          git diff --exit-code --color -- snikket_web/translations/messages.pot
-
-
   build:
     runs-on: ubuntu-latest
 

Dockerfile

@@ -17,7 +17,8 @@ COPY babel.cfg /opt/snikket-web-portal/babel.cfg
 
 WORKDIR /opt/snikket-web-portal
 
-RUN pip3 install -r requirements.txt; \
+RUN set -eu; \
+    pip3 install -r requirements.txt; \
     pip3 install -r build-requirements.txt; \
     make;
 
@@ -47,7 +48,7 @@ RUN set -eu; \
 WORKDIR /opt/snikket-web-portal
 
 COPY requirements.txt /opt/snikket-web-portal/requirements.txt
-RUN pip3 install -r requirements.txt; rm -rf /root/.cache;
+RUN set -eu; pip3 install -r requirements.txt; rm -rf /root/.cache;
 
 COPY --from=build /opt/snikket-web-portal/snikket_web/ /opt/snikket-web-portal/snikket_web
 COPY babel.cfg /opt/snikket-web-portal/babel.cfg