Add NPM package, debs, rpms and refactor CI/build process

Closes many issues that I'll prune after adding more docs
for users.

ci/build/build-static-pkgs.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Generates deb and rpm packages for CI.
+# Assumes a static release has already been built.
+
+main() {
+  cd "$(dirname "${0}")/../.."
+  source ./ci/lib.sh
+
+  VERSION="$(pkg_json_version)"
+  export VERSION
+
+  ARCH="$(arch)"
+  export ARCH
+
+  local nfpm_config
+  nfpm_config=$(envsubst < ./ci/build/nfpm.yaml)
+
+  nfpm pkg -f <(echo "$nfpm_config") --target release-github/code-server-"$VERSION-$ARCH.deb"
+  nfpm pkg -f <(echo "$nfpm_config") --target release-github/code-server-"$VERSION-$ARCH.rpm"
+}
+
+main "$@"