diff --git a/backend/.env.example b/backend/.env.example
index b1a3df1..68b5ddd 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -2,4 +2,5 @@ PORT=3000
 DATA_DIR="./data"
 SEMANTIC_SCHOLAR_API_KEY=
 ETH_NETWORK="localhost"
-ETH_PRIVATE_KEY=
\ No newline at end of file
+ETH_PRIVATE_KEY=
+INFURA_API_KEY=
\ No newline at end of file
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 7e32835..eb40619 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -2,7 +2,7 @@ FROM node
 
 WORKDIR /app
 
-ADD package.json package-lock.json src/ /app/
+ADD package.json package-lock.json contract-addresses.json src/ /app/
 
 RUN npm ci