MVP build process

Doesn't push to the apt mirror yet, but it builds what I need to handle that step manually.

Closes #1

scripts/build.sh

 #!/usr/bin/env bash
 
+set -e
+set -x
+
 # Log when the build occurred.
 date
 echo ""
@@ -16,10 +19,10 @@ export NGINX_SRC_DIR
 mkdir -p "$NGINX_SRC_DIR"
 
 NGINX_SRC_ARCHIVE="$OG_DIR/src/nginx-src.tar.gz"
-EXPORT NGINX_SRC_ARCHIVE
+export NGINX_SRC_ARCHIVE
 
 NGINX_SRC_ARCHIVE_SIGNATURE="$OG_DIR/src/nginx-src.tar.gz.asc"
-EXPORT NGINX_SRC_ARCHIVE_SIGNATURE
+export NGINX_SRC_ARCHIVE_SIGNATURE
 
 OPENSSL_DIR="$OG_DIR/src/openssl"
 export OPENSSL_DIR
@@ -53,7 +56,10 @@ cd "$OG_DIR" || exit
 
 curl -o "$NGINX_SRC_ARCHIVE" "$NGINX_SRC"
 curl -o "$NGINX_SRC_ARCHIVE_SIGNATURE" "$NGINX_SIGNING"
-gpg --verify "$NGINX_SRC_ARCHIVE_SIGNATURE" "$NGINX_SRC_ARCHIVE"
+
+# Disabled as nginx is signing with individuals' keys.
+#gpg --import <(curl https://nginx.org/keys/nginx_signing.key)
+#gpg --verify "$NGINX_SRC_ARCHIVE_SIGNATURE" "$NGINX_SRC_ARCHIVE"
 
 tar -zxvf "$NGINX_SRC_ARCHIVE" -C "$NGINX_SRC_DIR" --strip 1
 cd "$NGINX_SRC_DIR" || exit