Testing functions in crystal. Had to commit the template because it was outdated

template/crystal-http/Dockerfile

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+FROM ghcr.io/openfaas/of-watchdog:0.9.11 as watchdog
+
+FROM crystallang/crystal:1.8.2
+
+COPY --from=watchdog /fwatchdog /usr/bin/fwatchdog
+RUN chmod +x /usr/bin/fwatchdog
+
+ARG ADDITIONAL_PACKAGE
+RUN apt-get update \
+  && apt-get install -qy --no-install-recommends ${ADDITIONAL_PACKAGE}
+
+WORKDIR /home/app
+
+COPY . .
+COPY function/shard.yml shard.yml
+RUN shards install
+RUN crystal build main.cr -o handler --release
+
+# Create a non-root user
+RUN addgroup --system app \
+    && adduser --system --ingroup app app
+
+RUN chown app:app -R /home/app
+
+USER app
+
+WORKDIR /home/app
+
+ENV fprocess="./handler"
+EXPOSE 8080
+
+HEALTHCHECK --interval=2s CMD [ -e /tmp/.lock ] || exit 1
+
+ENV upstream_url="http://127.0.0.1:5000"
+ENV mode="http"
+
+CMD ["fwatchdog"]