Dropping Support for armv7l due to security bugs in cryptography

- Adjusted `pyOpenSSL` versioning in `requirements.txt` to support armv7l architecture.
- Modified Docker build platforms in GitHub Actions workflow to exclude armv7, focusing on amd64 and arm64.

.github/workflows/buildx.yml

@@ -52,7 +52,7 @@ jobs:
           docker buildx build --push \
             --tag benbusby/whoogle-search:update-testing \
             --tag ghcr.io/benbusby/whoogle-search:update-testing \
-            --platform linux/amd64,linux/arm/v7,linux/arm64 .
+            --platform linux/amd64,linux/arm64 .
       - name: build and push release (version + latest)
         if: github.event_name == 'release' && github.event.release.prerelease == false && (github.actor == 'benbusby' || github.actor == 'Don-Swanson')
         run: |
@@ -63,7 +63,7 @@ jobs:
             --tag benbusby/whoogle-search:latest \
             --tag ghcr.io/benbusby/whoogle-search:${VERSION} \
             --tag ghcr.io/benbusby/whoogle-search:latest \
-            --platform linux/amd64,linux/arm/v7,linux/arm64 .
+            --platform linux/amd64,linux/arm64 .
       - name: build and push pre-release (version only)
         if: github.event_name == 'release' && github.event.release.prerelease == true && (github.actor == 'benbusby' || github.actor == 'Don-Swanson')
         run: |
@@ -72,7 +72,7 @@ jobs:
           docker buildx build --push \
             --tag benbusby/whoogle-search:${VERSION} \
             --tag ghcr.io/benbusby/whoogle-search:${VERSION} \
-            --platform linux/amd64,linux/arm/v7,linux/arm64 .
+            --platform linux/amd64,linux/arm64 .
       # Disabled: Use GitHub releases instead (triggers release or pre-release workflows above)
       # - name: build and push tag
       #   if: startsWith(github.ref, 'refs/tags')
@@ -80,4 +80,4 @@ jobs:
       #     docker buildx build --push \
       #       --tag benbusby/whoogle-search:${GITHUB_REF#refs/*/v} \
       #       --tag ghcr.io/benbusby/whoogle-search:${GITHUB_REF#refs/*/v} \
-      #       --platform linux/amd64,linux/arm/v7,linux/arm64 .
+      #       --platform linux/amd64,linux/arm64 .

Dockerfile

@@ -1,3 +1,13 @@
+# NOTE: ARMv7 support has been dropped due to lack of pre-built cryptography wheels for Alpine/musl.
+# To restore ARMv7 support for local builds:
+# 1. Change requirements.txt:
+#    cryptography==3.3.2; platform_machine == 'armv7l'
+#    cryptography==46.0.1; platform_machine != 'armv7l'
+#    pyOpenSSL==19.1.0; platform_machine == 'armv7l'
+#    pyOpenSSL==25.3.0; platform_machine != 'armv7l'
+# 2. Add linux/arm/v7 to --platform flag when building:
+#    docker buildx build --platform linux/amd64,linux/arm/v7,linux/arm64 .
+
 FROM python:3.12.6-alpine3.20 AS builder
 
 RUN apk --no-cache add \

README.md

@@ -88,6 +88,17 @@ Contents
 <sup>***If deployed to a remote server, or configured to send requests through a VPN, Tor, proxy, etc.</sup>
 
 ## Install
+
+### Supported Platforms
+Official Docker images are built for:
+- **linux/amd64** (x86_64)
+- **linux/arm64** (ARM 64-bit, Raspberry Pi 3/4/5, Apple Silicon)
+
+**Note**: ARMv7 support (32-bit ARM, Raspberry Pi 2) was dropped in v1.2.0 due to incompatibility with modern security libraries on Alpine Linux. Users with ARMv7 devices can either:
+- Use an older version (v1.1.x or earlier)
+- Build locally with pinned dependencies (see notes in Dockerfile)
+- Upgrade to a 64-bit OS if hardware supports it (Raspberry Pi 3+)
+
 There are a few different ways to begin using the app, depending on your preferences:
 
 ___