Enhance emulator setup with Caddy support and update documentation

- Added Caddyfile example for HTTPS configuration.
- Updated README to include Caddy as an optional component.
- Modified make-certs.sh to use dynamic account names for certificate generation.
- Improved add-account.sh to handle missing accounts.env file gracefully.
- Enhanced run-server.sh to support Caddy integration and OAuth options.

add-account.sh

@@ -1,22 +1,27 @@
 #!/usr/bin/env bash
 
 if [[ -z "$1" ]]; then
-  echo "Usage: $0 <account-name> [ password ]"
-  exit 1
+    echo "Usage: $0 <account-name> [ password ]"
+    exit 1
 fi
 
 if [[ -z "$2" ]]; then
-  PASSWORD=$(openssl rand -base64 32)
+    PASSWORD=$(openssl rand -base64 32)
 else
-  PASSWORD=$(echo -n "$2" | base64)
+    PASSWORD=$(echo -n "$2" | base64)
 fi
 
 AZURITE_DIR="storage"
 mkdir -p "$AZURITE_DIR"
-
 AZURITE_ACCOUNTS_FILE="$AZURITE_DIR/accounts.env"
-. $AZURITE_ACCOUNTS_FILE
 
-STORAGE_ACCOUNTS=($(echo "$AZURITE_ACCOUNTS" | tr ';' ' '))
+if [[ -f "$AZURITE_ACCOUNTS_FILE" ]]; then
+    . "$AZURITE_ACCOUNTS_FILE"
+    STORAGE_ACCOUNTS=($(echo "$AZURITE_ACCOUNTS" | tr ';' ' '))
+else
+    # No accounts file, start with an empty array
+    STORAGE_ACCOUNTS=()
+fi
+
 STORAGE_ACCOUNTS+=("$1:$PASSWORD")
 printf 'AZURITE_ACCOUNTS="%s"\n' $(IFS=';'; echo "${STORAGE_ACCOUNTS[*]}") > "$AZURITE_ACCOUNTS_FILE"