feat: add docker run

Signed-off-by: Fred Tupas <fred.tupas21@gmail.com>

Dockerfile

@@ -0,0 +1,29 @@
+FROM rust:alpine3.20 AS builder
+WORKDIR /app
+
+# Install system dependencies
+RUN apk add --no-cache musl-dev=1.2.5-r0
+
+# Build application
+COPY . .
+RUN cargo build --release
+
+# Create runtime image
+FROM debian:bookworm-slim AS runtime
+WORKDIR /usr/src/app
+
+# Create non-root user
+RUN useradd -m -s /bin/bash rainfrog
+
+# Copy the binary from the builder image
+COPY --chmod=755 --from=builder /app/target/release/rainfrog /usr/local/bin/rainfrog
+
+# Change ownership of the files to the non-root user
+RUN chown -R rainfrog:rainfrog /usr/src/app
+USER rainfrog
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD pidof rainfrog || exit 1
+
+# Command to construct the full connection URL using environment variables
+CMD ["bash", "-c", "rainfrog --url postgres://$username:$password@$hostname:$db_port/$dbname"]

README.md

@@ -88,13 +88,32 @@ curl -LSsf https://raw.githubusercontent.com/achristmascarl/rainfrog/main/instal
 
 ## usage
 
-> [!NOTE] > `connection_url` must include your credentials for accessing the
-> database (ex. `postgres://username:password@localhost:5432/postgres`)
+> [!NOTE]
+> `connection_url` must include your credentials for accessing the database (ex. `postgres://username:password@localhost:5432/postgres`) 
 
 ```sh
 rainfrog --url $(connection_url)
 ```
 
+### `docker run`
+
+> [!NOTE]
+> For now we build the image locally until the image is available in Docker Hub
+
+```sh
+docker build . -t rainfrog
+```
+
+```sh
+docker run -it --rm --name rainfrog \
+  -p <db_port>:<db_port> \
+  -e username="<username>" \
+  -e password="<password>" \
+  -e hostname="host.docker.internal" \
+  -e db_port="<db_port>" \
+  -e dbname="<dbname>" rainfrog
+```
+
 ## keybindings
 
 ### general