Add docker/update_conduwuit.sh

docker/update_conduwuit.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Navigate to the repository directory
+cd "$HOME/conduwuit" || exit
+
+# Pull the latest changes
+git pull
+
+# Build the Docker image using Nix
+nix build -L --extra-experimental-features "nix-command flakes" .#oci-image-x86_64-linux-musl-all-features
+
+# Extract the image tarball path from the build result
+IMAGE_TAR_PATH=$(nix path-info -r .#oci-image-x86_64-linux-musl-all-features)/image.tar.gz
+
+# Load the image into Docker and tag it
+docker load < "$IMAGE_TAR_PATH" | awk '/Loaded image:/ { print $3 }' | xargs -I {} docker tag {} conduwuit:custom
+
+# Confirm tagging
+echo "Docker image tagged as conduwuit:custom"