Remove workaround for cryptography package

The cryptography package fails to compile on 32-bit architectures
that are QEMU emulated on a 64-bit host. We had a workaround before
where we pinned the version to one that did compile without issues,
but some dependency now needs a newer version which braks everything
again.

Next type of workaround is now to change the filesystem to a tmpfs
one, which apparently does not trigger this bug. More information
is available in the issue:
#30

.github/workflows/build_latest.yml

@@ -21,7 +21,7 @@ jobs:
     timeout-minutes: 90
     steps:
       - name: Run Docker on tmpfs
-        uses: JonasAlfredsson/docker-on-tmpfs@main
+        uses: JonasAlfredsson/docker-on-tmpfs@v1.0.0
         with:
           tmpfs_size: 4
 
@@ -43,7 +43,6 @@ jobs:
             linux/arm64
             linux/arm/v7
           push: ${{ github.event_name != 'pull_request' }}
-          build-args: BUILDX_QEMU_ENV=false
           tags: jonasal/nginx-certbot:latest
 
       - name: Print usage info
@@ -55,9 +54,10 @@ jobs:
 
   docker_buildx_alpine:
     runs-on: ubuntu-latest
+    timeout-minutes: 180
     steps:
       - name: Run Docker on tmpfs
-        uses: JonasAlfredsson/docker-on-tmpfs@main
+        uses: JonasAlfredsson/docker-on-tmpfs@v1.0.0
         with:
           tmpfs_size: 4
 

.github/workflows/build_tags.yml

@@ -10,8 +10,13 @@ on:
 jobs:
   docker_buildx_debian:
     runs-on: ubuntu-latest
-    timeout-minutes: 60
+    timeout-minutes: 90
     steps:
+      - name: Run Docker on tmpfs
+        uses: JonasAlfredsson/docker-on-tmpfs@v1.0.0
+        with:
+          tmpfs_size: 4
+
       - name: Perform setup steps
         uses: JonasAlfredsson/checkout-qemu-buildx@v1.0.0
         with:
@@ -36,7 +41,6 @@ jobs:
           pull: true
           no-cache: true
           push: true
-          build-args: BUILDX_QEMU_ENV=true
           tags: |
             jonasal/nginx-certbot:${{ steps.tagger.outputs.APP_MAJOR }}
             jonasal/nginx-certbot:${{ steps.tagger.outputs.APP_MAJOR }}.${{ steps.tagger.outputs.APP_MINOR }}
@@ -45,8 +49,13 @@ jobs:
 
   docker_buildx_alpine:
     runs-on: ubuntu-latest
-    timeout-minutes: 60
+    timeout-minutes: 180
     steps:
+      - name: Run Docker on tmpfs
+        uses: JonasAlfredsson/docker-on-tmpfs@v1.0.0
+        with:
+          tmpfs_size: 4
+
       - name: Perform setup steps
         uses: JonasAlfredsson/checkout-qemu-buildx@v1.0.0
         with:
@@ -66,6 +75,7 @@ jobs:
           platforms: |
             linux/amd64
             linux/arm64
+            linux/arm/v7
           pull: true
           no-cache: true
           push: true

src/Dockerfile

@@ -37,11 +37,6 @@ RUN set -ex && \
     && \
 # Install the latest version of PIP, Setuptools and Wheel.
     curl -L 'https://bootstrap.pypa.io/get-pip.py' | python3 && \
-# Handle an extremely specific issue when building the cryptography package for
-# 32-bit architectures within QEMU running on a 64-bit host (issue #30).
-    if [ "${BUILDX_QEMU_ENV}" = "true" ] && [ "$(getconf LONG_BIT)" = "32" ]; then \
-        pip3 install -U cryptography==3.3.2; \
-    fi && \
 # Install certbot.
     pip3 install -U cffi certbot \
 # And the supported extra authenticators