Initial docker files trinity

The image builds as is, but running it exits with: standard_init_linux.go:211: exec user process caused "no such file or directory"

.dockerignore

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+# Local build and dev artifacts
+target
+sytest
+
+# Docker files
+Dockerfile*
+docker-compose*
+
+# IDE files
+.vscode
+.idea
+*.iml
+
+# Git folder
+.git
+.gitea
+
+# Dot files
+.env
+.gitignore
+
+# Toml files
+rustfmt.toml
+Rocket-example.toml
+
+# Documentation
+*.md

Dockerfile

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+# Using multistage build:
+# 	https://docs.docker.com/develop/develop-images/multistage-build/
+# 	https://whitfin.io/speeding-up-rust-docker-builds/
+
+
+##########################  BUILD IMAGE  ##########################
+# Musl build image to build Conduits statically compiled binary
+FROM rustlang/rust:nightly-alpine3.12 as builder
+
+# Don't download Rust docs
+RUN rustup set profile minimal
+
+ENV USER "conduit"
+#ENV RUSTFLAGS='-C link-arg=-s'
+
+# Install packages needed for building all crates
+RUN apk add --no-cache \
+        musl-dev \
+        openssl-dev \
+        pkgconf
+
+# Create dummy project to fetch all dependencies.
+# Rebuilds are a lot faster when there are no changes in the
+# dependencies.
+RUN cargo new --bin /app
+WORKDIR /app
+
+# Copy cargo files which specify needed dependencies
+COPY ./Cargo.* ./
+
+# Add musl target, as we want to run your project in
+# an alpine linux image
+RUN rustup target add x86_64-unknown-linux-musl
+
+# Build dependencies and remove dummy project, except
+# target folder, as it contains the dependencies
+RUN cargo build --release --color=always ; \
+    find . -not -path "./target*" -delete
+
+# Now copy and build the real project with the pre-built
+# dependencies.
+COPY . .
+RUN cargo build --release --color=always
+
+########################## RUNTIME IMAGE ##########################
+# Create new stage with a minimal image for the actual
+# runtime image/container
+FROM alpine:3.12
+
+ARG BUILD_DATE
+ARG VERSION
+ARG GIT_REF=HEAD
+
+# Labels inspired by this medium post:
+# https://medium.com/@chamilad/lets-make-your-docker-image-better-than-90-of-existing-ones-8b1e5de950d
+LABEL org.label-schema.build-date=${BUILD_DATE} \
+      org.label-schema.name="Conduit" \
+      org.label-schema.version=${VERSION} \
+      org.label-schema.vendor="Conduit Authors" \
+      org.label-schema.description="A Matrix homeserver written in Rust" \
+      org.label-schema.url="https://conduit.rs/" \
+      org.label-schema.vcs-ref=$GIT_REF \
+      org.label-schema.vcs-url="https://git.koesters.xyz/timo/conduit.git" \
+      ord.label-schema.docker.build="docker build . -t conduit:latest --build-arg BUILD_DATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ') --build-arg VERSION=$(grep -m1 -o '[0-9].[0-9].[0-9]' Cargo.toml)"\
+      maintainer="weasy@hotmail.de"
+
+# Change some Rocket.rs default configs. They can then
+# be changed to different values using env variables.
+ENV ROCKET_CLI_COLORS="on"
+#ENV ROCKET_SERVER_NAME="conduit.rs"
+ENV ROCKET_ENV="production"
+ENV ROCKET_ADDRESS=0.0.0.0
+ENV ROCKET_PORT=14004
+ENV ROCKET_LOG="normal"
+ENV ROCKET_DATABASE_PATH="/data/sled"
+ENV ROCKET_REGISTRATION_DISABLED="true"
+#ENV ROCKET_WORKERS=10
+
+EXPOSE 14004
+
+# Copy config files from context and the binary from
+# the "builder" stage to the current stage into folder
+# /srv/conduit and create data folder for database
+RUN mkdir -p /srv/conduit /data/sled
+
+COPY --from=builder /app/target/release/conduit ./srv/conduit/
+
+# Add www-data user and group with UID 82, as used by alpine
+# https://git.alpinelinux.org/aports/tree/main/nginx/nginx.pre-install
+RUN set -x ; \
+    addgroup -Sg 82 www-data 2>/dev/null ; \
+    adduser -S -D -H -h /srv/conduit -G www-data -g www-data www-data 2>/dev/null ; \
+    addgroup www-data www-data 2>/dev/null && exit 0 ; exit 1
+
+# Change ownership of Conduit files to www-data user and group
+RUN chown -cR www-data:www-data /srv/conduit /data
+
+VOLUME /data
+
+RUN apk add --no-cache \
+        ca-certificates
+
+# Set user to www-data
+USER www-data
+WORKDIR /srv/conduit
+ENTRYPOINT [ "/srv/conduit/conduit" ]

docker-compose.yml

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+# Conduit
+version: '3'
+
+services:
+    conduit:
+        image: conduit_homeserver
+        restart: unless-stopped
+        ports:
+            - 14004:14004
+        volumes:
+            - db:/data/sled
+        environment:
+            ROCKET_SERVER_NAME: example.com  # replace with your own name
+            ### Uncomment and change values as needed
+            #ROCKET_LOG: normal
+            #ROCKET_REGISTRATION_DISABLED: 'true'
+            #ROCKET_DATABASE_PATH: /data/sled
+            #ROCKET_WORKERS: 10
+
+volumes:
+    db: