chore: Update base docker images to alpine3.21 (#3875)

Author: spalmurray

docker/Dockerfile

@@ -1,5 +1,5 @@
 # syntax = docker/dockerfile:1.3
-FROM            alpine:3.17 as uploader
+FROM            alpine:3.21 as uploader
 USER            root
 WORKDIR         /tmp
 RUN             apk -U add gnupg curl
@@ -24,7 +24,9 @@ RUN             curl -s -o linux/codecov https://uploader.codecov.io/latest/linu
   curl -s -o windows/codecov.exe.SHA256SUM https://uploader.codecov.io/latest/windows/codecov.exe.SHA256SUM && \
   curl -s -o windows/codecov.exe.SHA256SUM.sig https://uploader.codecov.io/latest/windows/codecov.exe.SHA256SUM.sig
 
-RUN             gpg --verify linux/codecov.SHA256SUM.sig linux/codecov.SHA256SUM && \
+# This gpg command is required for the next RUN to work. Something about gpg-agent I'd guess, but this seems to resolve it.
+RUN             gpg --list-keys 
+RUN             gpg --verify linux/codecov.SHA256SUM.sig linux/codecov.SHA256SUM && \ 
   gpg --verify alpine/codecov.SHA256SUM.sig alpine/codecov.SHA256SUM && \
   gpg --verify macos/codecov.SHA256SUM.sig macos/codecov.SHA256SUM && \
   gpg --verify windows/codecov.exe.SHA256SUM.sig windows/codecov.exe.SHA256SUM && \
@@ -35,7 +37,7 @@ RUN             gpg --verify linux/codecov.SHA256SUM.sig linux/codecov.SHA256SUM
 
 COPY            docker/index.html /tmp/uploader
 
-FROM node:22-alpine3.20 as build
+FROM node:22-alpine3.21 as build
 ARG REACT_APP_ENV_ARG
 ARG REACT_APP_CODECOV_VERSION
 ENV REACT_APP_ENV=$REACT_APP_ENV_ARG
@@ -50,7 +52,7 @@ RUN yarn install
 RUN yarn build && rm -f build/mockServiceWorker.js
 
 
-FROM alpine:3.17
+FROM alpine:3.21
 ARG REACT_APP_CODECOV_VERSION
 ARG ENVIRONMENT
 ARG COMMIT_SHA
@@ -76,12 +78,12 @@ RUN  addgroup -S application \
 
 COPY --chown=codecov:application docker/start-nginx.sh /usr/bin/start-nginx
 
-RUN chown -R codecov.application /var/www/app && \
-  chown -R codecov.application /run && \
-  chown -R codecov.application /var/lib/nginx && \
-  chown -R codecov.application /var/log/nginx && \
+RUN chown -R codecov:application /var/www/app && \
+  chown -R codecov:application /run && \
+  chown -R codecov:application /var/lib/nginx && \
+  chown -R codecov:application /var/log/nginx && \
   chmod +x /usr/bin/start-nginx && \
-  chown codecov.application /etc/nginx/nginx.conf
+  chown codecov:application /etc/nginx/nginx.conf
 # Switch to use a non-root user from here on
 USER codecov
 
@@ -94,4 +96,4 @@ EXPOSE 8080
 CMD ["/usr/bin/start-nginx"]
 
 # syntax=docker/dockerfile:1.3
-ARG FRONTEND_IMAGE
+ARG FRONTEND_IMAGE