[#98] s3_gate: Fix custom user wallets folder creation during compose up

Make custom wallets volume to point to the `wallets` directory in the project's root.
Fix defaults for issuing credentials.

Signed-off-by: Nikita Zinkevich <n.zinkevich@yadro.com>

README.md

@@ -143,7 +143,7 @@ Registers user wallet and issues s3 credentials.
 
 Usage and default parameter values:
 ```sh
-make s3cred [password=""] [contract_password=s3] [wallet=/user_wallet.json] [gate_public_key=0313b1ac3a8076e155a7e797b24f0b650cccad5941ea59d7cfd51a024a8b2a06bf]
+make s3cred [password=s3] [contract_password=s3] [wallet=""] [gate_public_key=0313b1ac3a8076e155a7e797b24f0b650cccad5941ea59d7cfd51a024a8b2a06bf]
 ```
 
 As soon as the storage node is in the network map (see above) you can generate S3
@@ -159,8 +159,9 @@ $ make s3cred
   "container_id": "EXArWh8x1zeHG3851s1RtoCo7dowxF6rhLGA15nbMffT"
 }                   
 ```
-Running without any parameters will result in defaults which are based on the private key from
-`/user-wallet.json` file and `/wallet.json` contract wallet.
+Running without any parameters results in defaults which are based on the private key from
+`/wallet.json` gate wallet both as a user and as a contract wallet.
+If `wallet` parameter is set, gate searches custom user wallet file in `/wallets` directory.
 
 Now let's configure an S3 client (AWS CLI will be used as example):
 
@@ -172,7 +173,7 @@ Default region name []: us-east-1
 Default output format []: json
 ```
 
-If you need to create credentials for different users, put user wallets to `wallets` dir and specify them via `wallet` parameter.
+If you need to create credentials for different users, put user wallet to `wallets` dir and specify it via `wallet` parameter.
 Pass wallet password in `password` parameter if it's not default. The same is for `contract_wallet` and `gate_public_key` params.
 
 ```sh

services/s3_gate/docker-compose.yml

@@ -14,10 +14,8 @@ services:
     volumes:
       # Gate wallet
       - ./wallet.json:/wallet.json
-      # Custom user wallets
-      - ./wallets:/wallets
-      # Default user wallet
-      - ./../../wallets/wallet.json:/wallets/wallet.json
+      # Folder for custom user wallets
+      - ./../../wallets/:/wallets/
       - ./tls.key:/tls.key
       - ./tls.crt:/tls.crt
       - ./../../vendor/hosts:/etc/hosts

services/s3_gate/issue-creds.sh

@@ -18,13 +18,16 @@ issueCreds() {
 
 set -e
 
+# custom user wallet
 WALLET_PATH=/wallets/$2
 if [[ -z "$2" ]]; then
-  WALLET_PATH=/wallets/wallet.json
+  # use gate wallet
+  WALLET_PATH=/wallet.json
 fi
 
 S3_GATE_PUBLIC_KEY=$3
 if [[ -z "$3" ]]; then
+  # use gate wallet's public key
   S3_GATE_PUBLIC_KEY=0313b1ac3a8076e155a7e797b24f0b650cccad5941ea59d7cfd51a024a8b2a06bf
 fi 
 

services/s3_gate/prepare.mk

@@ -1,6 +1,6 @@
 .PHONY: s3cred register
 
-password?=
+password?=s3
 contract_password?=s3
 gate_public_key?=
 wallet?=