use gitea actions

Containerfile

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+FROM docker.io/alpine:3.19 as builder
+
+RUN apk add --no-cache \
+  git \
+  npm \
+  bash \
+  python3 \
+  make \
+  sed \
+  g++ \
+  musl-dev
+
+#ENV NODE_ENV=production
+
+# to get around errors from differing stack sizes in musl
+# https://wiki.musl-libc.org/functional-differences-from-glibc.html#Thread_stack_size
+#RUN npm config set unsafe-perm true
+ENV NODE_OPTIONS=--openssl-legacy-provider
+RUN npm install -g \
+  webpack \
+  webpack-cli \
+  node-gyp
+
+ENV WIKIJS_VERSION=v2.5.300
+
+RUN git clone https://github.com/Requarks/wiki.git -b $WIKIJS_VERSION /build
+
+WORKDIR /build
+RUN npm install --legacy-peer-deps
+# don't know why this is needed here too, but what the hell
+RUN npm install --legacy-peer-deps --save-dev webpack webpack-cli
+RUN npx webpack --profile --config dev/webpack/webpack.prod.js
+RUN sed -i '0,/.*"dev".*/s//"dev": false,/' package.json
+
+FROM docker.io/thallian/confd-env:3.19-3.1.6.2
+
+ENV NODE_ENV=production
+
+RUN addgroup -g 2222 wikijs
+RUN adduser -h /home/wikijs -S -D -u 2222 -G wikijs wikijs
+
+COPY --from=builder --chown=wikijs:wikijs /build/assets /home/wikijs/assets
+COPY --from=builder --chown=wikijs:wikijs /build/node_modules /home/wikijs/node_modules
+COPY --from=builder --chown=wikijs:wikijs /build/server /home/wikijs/server
+COPY --from=builder --chown=wikijs:wikijs /build/LICENSE /home/wikijs/LICENSE
+COPY --from=builder --chown=wikijs:wikijs /build/config.sample.yml /home/wikijs/config.sample.yml
+COPY --from=builder --chown=wikijs:wikijs /build/package.json /home/wikijs/package.json
+
+RUN apk add --no-cache \
+  nodejs \
+  git \
+  openssh-client
+
+ADD /rootfs /
+
+VOLUME [ "/home/wikijs/data" ]
+EXPOSE 3000