diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..c5110d7
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,7 @@
+node_modules
+.env
+.env.development
+.env.production
+.git
+db.development.sqlite
+server/snark_files/response_*
diff --git a/.gitignore b/.gitignore
index 7576c55..f653d7c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -92,3 +92,4 @@ sw.*
 db.development.sqlite
 .env.development
 .env.production
+server/snark_files/response_*
diff --git a/README.md b/README.md
index 3c7fb8e..0ea179c 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ $ yarn dev
 ```
 
 ## Production setup
+Follow instructions in the [Initialize ceremony]() section to generate `current.params` file.
 ``` bash
 # Edit all necessary environment variables. See the explanation above.
 $ cp .env.example .env.production
@@ -49,3 +50,17 @@ $ cd ..
 # Run the app and mysql database containers. It will use the MYSQL_USER, MYSQL_PASSWORD and MYSQL_DATABASE vars you specified in .env.production file.
 $ docker-compose up -d
 ```
+
+# Initialize ceremony (`current.params` file creation):
+1. `git clone https://github.com/tornadocash/phase2-bn254 && cd phase2-bn254`
+1. `git checkout wasm`
+1. go to `./powersoftau/src/bn256/mod.rs` and change `REQUIRED_POWER` to 15 (it's going to fit 36k constaints snark)
+1. `cd powersoftau`
+1. run `./test.sh`. After this step you will get many `phase1radix*` files.
+1. Download [withdraw.json](https://github.com/tornadocash/tornado-core/releases/download/v2.0/withdraw.json) for required circuit to `./phase2` folder
+1. `cd ../phase2`
+1. `cp ../powersoftau/phase1radix* .`
+1. `cargo run --release --bin new withdraw.json current.params`
+1. The `current.params` file is your initial challenge file.
+1. copy `current.params`, `withdraw.json` and `phase1radix*` to `./server/snark_files` folder.
+1. `mv withdraw.json circuit.json`
diff --git a/server/controllers/contribute.js b/server/controllers/contribute.js
index e44ea68..af7d6b0 100644
--- a/server/controllers/contribute.js
+++ b/server/controllers/contribute.js
@@ -91,6 +91,10 @@ router.post('/response', upload.single('response'), async (req, res) => {
 
       console.log('Committing changes')
       await fs.rename(`/tmp/tornado/${req.file.filename}`, './server/snark_files/current.params')
+      await fs.copyFile(
+        './server/snark_files/current.params',
+        `./server/snark_files/response_${contributionIndex}`
+      )
 
       console.log('Finished')
       res.json({ contributionIndex })
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