Update docker contrib with lightweight alpine based image

contrib/docker/Dockerfile

@@ -1,7 +1,13 @@
-FROM debian:10.10
-RUN apt update && apt install -y wget curl libxml2
-
-ARG VERSION
-RUN wget https://github.com/Orange-OpenSource/hurl/releases/download/${VERSION}/hurl_${VERSION}_amd64.deb
-RUN apt install ./hurl_${VERSION}_amd64.deb
+FROM alpine:3.15 AS builder
+WORKDIR /tmp
+RUN apk add git jq curl cargo gcc libffi-dev libxml2-dev libxml2-utils openssl-dev
+RUN git clone --quiet --depth 1 --branch $(curl --silent "https://api.github.com/repos/Orange-OpenSource/hurl/releases/latest" | jq -r .tag_name) https://github.com/Orange-OpenSource/hurl.git
+WORKDIR /tmp/hurl
+RUN cargo build --release --verbose --bin hurl
 
+FROM alpine:3.15 AS runner
+COPY --from=builder /tmp/hurl/target/release/hurl /usr/sbin/
+COPY --from=builder /usr/lib/libxml2.so.2 /usr/lib/
+COPY --from=builder /usr/lib/libgcc_s.so.1 /usr/lib/
+COPY --from=builder /usr/lib/liblzma.so.5 /usr/lib/
+ENTRYPOINT ["/usr/sbin/hurl"]

contrib/docker/README

@@ -1,10 +0,0 @@
-#export VERSION=$(grep '^version' ../../packages/hurl/Cargo.toml | cut -f2 -d'"')
-export VERSION=1.4.0
-
-# Build image
-docker build . -t hurl:$VERSION --build-arg VERSION=$VERSION
-
-# Run
-docker run hurl:$VERSION hurl --version
-
-

contrib/docker/README.md

@@ -0,0 +1,25 @@
+# Build image
+
+```
+docker build --tag hurl:latest .
+```
+
+# Get docker hurl version
+
+```
+docker run --rm hurl:latest --version
+```
+
+# Run docker hurl from STDIN
+
+```
+echo -e "GET https://hurl.dev\n\nHTTP/1.1 200" | docker run --rm -i hurl:latest --test --color
+```
+
+# Run docker hurl from FILE
+
+```
+echo -e "GET https://hurl.dev\n\nHTTP/1.1 200" > /tmp/test.hurl
+ocker run --rm -v /tmp/test.hurl:/tmp/test.hurl -w /tmp hurl:latest --test --color /tmp/test.hurl
+```
+