update sample env

Author: vas3a

.env.sample

@@ -1,4 +1,5 @@
-TOPCODER_API_BASE_URL="https://api.topcoder-dev.com/v5"
+TOPCODER_API_V5_BASE_URL="https://api.topcoder-dev.com/v5"
+TOPCODER_API_V6_BASE_URL="https://api.topcoder-dev.com/v6"
 AUTH0_CERT="-----BEGIN RSA PUBLIC KEY-----
 MIIBCgKCAQEArAV0dmDkedFdlaQ6KQiqUv+UGshfMXx/4jJCLZ9802ynJqAvIt+Z
 V7EiPqjc2J1xVfJJEvQ9ZS5A2TFWAk16NUTU4LN+TkjEnqeg+LlUPWY3Y4RXa2OU
@@ -15,4 +16,4 @@ DB_PASSWORD=randompassword
 DB_HOST=127.0.0.1
 DB_PORT=5434
 DB_NAME=walletdb
-DATABASE_URL="postgresql://${DB_USERNAME}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}?sslmode=disable"
+DATABASE_URL="postgresql://${DB_USERNAME}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}?sslmode=disable"