Add dockerfile

.dockerignore

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+/.rustwide
+**/target

Dockerfile

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+FROM rust:slim
+
+### STEP 1: Install dependencies ###
+# Install packaged dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  build-essential git curl cmake gcc g++ pkg-config libmagic-dev \
+  libssl-dev zlib1g-dev sudo docker.io
+
+### STEP 2: Create user ###
+ENV HOME=/home/cratesfyi
+RUN adduser --home $HOME --disabled-login --disabled-password --gecos "" cratesfyi
+
+### STEP 3: Setup build environment as new user ###
+ENV CRATESFYI_PREFIX=/home/cratesfyi/prefix
+RUN mkdir $CRATESFYI_PREFIX && chown cratesfyi:cratesfyi "$CRATESFYI_PREFIX"
+
+USER cratesfyi
+RUN mkdir -vp "$CRATESFYI_PREFIX"/documentations "$CRATESFYI_PREFIX"/public_html "$CRATESFYI_PREFIX"/sources
+RUN git clone https://github.com/rust-lang/crates.io-index.git "$CRATESFYI_PREFIX"/crates.io-index
+RUN git --git-dir="$CRATESFYI_PREFIX"/crates.io-index/.git branch crates-index-diff_last-seen
+
+### STEP 4: Build the project ###
+# Build the dependencies in a separate step to avoid rebuilding all of them
+# every time the source code changes. This takes advantage of Docker's layer
+# caching, and it works by copying the Cargo.{toml,lock} with dummy source code
+# and doing a full build with it.
+RUN mkdir -p ~/docs.rs ~/docs.rs/src/web/badge
+WORKDIR $HOME/docs.rs
+COPY --chown=cratesfyi Cargo.lock Cargo.toml ./
+COPY --chown=cratesfyi src/web/badge src/web/badge/
+RUN echo "fn main() {}" > src/main.rs && \
+    echo "fn main() {}" > build.rs
+
+RUN cargo fetch
+RUN cargo build --release
+
+### STEP 5: Build the website ###
+# Dependencies are now cached, copy the actual source code and do another full
+# build. The touch on all the .rs files is needed, otherwise cargo assumes the
+# source code didn't change thanks to mtime weirdness.
+RUN rm -rf src build.rs
+COPY --chown=cratesfyi src src/
+COPY --chown=cratesfyi build.rs build.rs
+COPY --chown=cratesfyi templates templates/
+RUN touch build.rs && find src -name "*.rs" -exec touch {} \; && cargo build --release
+
+ADD css $CRATESFYI_PREFIX/public_html
+
+ENV DOCS_RS_DOCKER=true
+COPY docker-entrypoint.sh ./
+USER root
+ENTRYPOINT ./docker-entrypoint.sh