Minor fixes

Author: Aleksandr Penskoi

.gitmodules

@@ -15,4 +15,4 @@
 	url = https://github.com/mlabs-haskell/plutus-use-cases
 [submodule "seabug-contracts"]
 	path = seabug-contracts
-	url = https://github.com/mlabs-haskell/seabug-contracts
+	url = git@github.com:mlabs-haskell/seabug-contracts.git

buildFrontendStage2.sh

@@ -17,7 +17,7 @@ ln -s $SEABUG/seabug-contracts \
       $SEABUG/nft-marketplace/node_modules/seabug-contracts
 
 cd $SEABUG/nft-marketplace
-rm .env
+rm -f .env
 cat <<EOT >> .env
 SKIP_PREFLIGHT_CHECK=true
 NODE_PATH=./src\