docker reworking

lib/readme.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+FB_FUNC_NAMES+=('gen_readme')
+FB_FUNC_DESCS['gen_readme']='generate project README.md'
+gen_readme() {
+	local readme="${REPO_DIR}/README.md"
+
+	echo "
+A collection of scripts for building ffmpeg and encoding content with the built ffmpeg
+
+Tested on:
+- linux x86_64/aarch64 on:
+$(printf '  - %s\n' "${VALID_DOCKER_IMAGES[@]}")
+- darwin aarch64
+
+\`\`\`bash
+$(print_cmds false)
+\`\`\`
+
+" >"${readme}"
+
+}