chore: add dev/deploy targets to Makefile, deploy.sh

deploy.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REGISTRY="registry.gabrielkaszewski.dev"
+REPO="pocket-chords"
+
+tag="latest"
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    --tag) tag="$2"; shift 2 ;;
+    *) echo "usage: $0 [--tag T]" >&2; exit 1 ;;
+  esac
+done
+
+image="${REGISTRY}/${REPO}:${tag}"
+
+echo "building ${image}"
+docker buildx build --platform linux/amd64 \
+  -t "$image" --push .
+echo "pushed $image"