docs: Add 24 files

squashthumbnailmaker/config/.template_info.env

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+# Template identifier - MUST match the directory name
+TEMPLATE=squashthumbnailmaker
+
+# Requirements
+REQUIRES_HOST_ROOT=false      # Whether root access on host is needed
+REQUIRES_DOCKER=true          # Whether Docker is required
+REQUIRES_DOCKER_ROOT=false    # Whether Docker root privileges are needed
+
+# Docker image settings (will be built locally)
+IMAGE_REGISTRY="local"
+IMAGE_REPO="squashthumbnailmaker"
+IMAGE_TAG="latest"
+
+# This is a utility container, no persistent volumes needed