Add Sparrow Server Dockerfile

docker/Dockerfile

@@ -0,0 +1,40 @@
+# Define Ubuntu 22.04 LTS as base image
+FROM ubuntu:22.04
+
+# Set Sparrow version and expected PGP signature
+ARG SPARROW_VERSION=1.7.0
+ARG PGP_SIG=E94618334C674B40
+
+# Update all packages and install requirements
+RUN apt-get update \
+    && apt-get upgrade -y \
+    && DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends curl \
+    gpg \
+    gpg-agent
+
+# Download Sparrow Server binaries and verification assets
+ADD https://github.com/sparrowwallet/sparrow/releases/download/${SPARROW_VERSION}/sparrow-server-${SPARROW_VERSION}-x86_64.tar.gz /tmp
+ADD https://github.com/sparrowwallet/sparrow/releases/download/${SPARROW_VERSION}/sparrow-${SPARROW_VERSION}-manifest.txt /tmp
+ADD https://github.com/sparrowwallet/sparrow/releases/download/${SPARROW_VERSION}/sparrow-${SPARROW_VERSION}-manifest.txt.asc /tmp
+ADD https://keybase.io/craigraw/pgp_keys.asc /tmp
+
+# Switch to /tmp for verification and install
+WORKDIR /tmp
+
+# GPG verify, sha256sum verify, and unpack Sparrow Server binaries
+RUN gpg --import pgp_keys.asc \
+    && gpg --status-fd 1 --verify sparrow-${SPARROW_VERSION}-manifest.txt.asc \
+    | grep -q "GOODSIG ${PGP_SIG}" \
+    || exit 1 \
+    && sha256sum --check sparrow-1.7.0-manifest.txt --ignore-missing || exit 1 \
+    && tar xvf sparrow-server-${SPARROW_VERSION}-x86_64.tar.gz -C /opt
+
+# Add user and setup directories for Sparrow
+RUN useradd -ms /bin/bash sparrow
+USER sparrow
+
+# Switch to home directory
+WORKDIR /home/sparrow
+
+# Run Sparrow in terminal mode
+CMD ["/opt/Sparrow/bin/Sparrow", "-t"]