Add cross-arch buildscript

build-and-push.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+set -euo pipefail
+
+ROOT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+cd "$ROOT_DIR"
+
+if [ -f .env ]; then
+  while IFS= read -r line || [ -n "$line" ]; do
+    # Skip empty lines and comments (leading whitespace ignored).
+    [[ $line =~ ^[[:space:]]*# ]] && continue
+    [[ -z ${line//[[:space:]]/} ]] && continue
+
+    if [[ $line =~ ^([A-Za-z_][A-Za-z0-9_]*)=(.*)$ ]]; then
+      key="${BASH_REMATCH[1]}"
+      value="${BASH_REMATCH[2]}"
+
+      # Strip trailing comments and surrounding whitespace.
+      value="${value%%#*}"
+      value="${value%$'\r'}"
+      value="${value#${value%%[![:space:]]*}}"
+      value="${value%${value##*[![:space:]]}}"
+
+      # Remove simple single or double quotes around the value.
+      if [[ $value =~ ^\".*\"$ || $value =~ ^\'.*\'$ ]]; then
+        value="${value:1:${#value}-2}"
+      fi
+
+      case "$key" in
+        SPYDER_IMAGE|BUILDX_PLATFORMS|BUILDX_BUILDER_NAME|LOCAL_IMAGE_NAME)
+          export "$key"="$value"
+          ;;
+      esac
+    fi
+  done < .env
+fi
+
+: "${SPYDER_IMAGE:?SPYDER_IMAGE must be set in .env or environment}"
+PLATFORMS=${BUILDX_PLATFORMS:-linux/amd64,linux/arm64}
+BUILDER=${BUILDX_BUILDER_NAME:-spyder-buildx}
+
+if ! docker buildx inspect "$BUILDER" >/dev/null 2>&1; then
+  docker buildx create --name "$BUILDER" --use
+else
+  docker buildx use "$BUILDER"
+fi
+
+echo "Building multi-arch image for $SPYDER_IMAGE on platforms: $PLATFORMS"
+
+docker buildx build \
+  --platform "$PLATFORMS" \
+  --tag "$SPYDER_IMAGE" \
+  --push \
+  --file Dockerfile \
+  .
+
+echo "Image pushed: $SPYDER_IMAGE"