update old local dev docs

.env.example

@@ -19,10 +19,6 @@ POSTGRES_DB=infisical
 # Redis
 REDIS_URL=redis://redis:6379
 
-# Optional credentials for MongoDB container instance and Mongo-Express
-MONGO_USERNAME=root
-MONGO_PASSWORD=example
-
 # Website URL
 # Required
 SITE_URL=http://localhost:8080

docs/contributing/platform/developing.mdx

@@ -16,49 +16,7 @@ git checkout -b MY_BRANCH_NAME
 ## Set up environment variables
 
 
-Start by creating a .env file at the root of the Infisical directory then copy the contents of the file below into the .env file.
-
-<Accordion title=".env file content">
-  ```env 
-    # Keys
-    # Required key for platform encryption/decryption ops
-    ENCRYPTION_KEY=6c1fe4e407b8911c104518103505b218
-
-    # JWT
-    # Required secrets to sign JWT tokens
-    JWT_SIGNUP_SECRET=3679e04ca949f914c03332aaaeba805a
-    JWT_REFRESH_SECRET=5f2f3c8f0159068dc2bbb3a652a716ff
-    JWT_AUTH_SECRET=4be6ba5602e0fa0ac6ac05c3cd4d247f
-    JWT_SERVICE_SECRET=f32f716d70a42c5703f4656015e76200
-
-    # MongoDB
-    # Backend will connect to the MongoDB instance at connection string MONGO_URL which can either be a ref
-    # to the MongoDB container instance or Mongo Cloud
-    # Required
-    MONGO_URL=mongodb://root:example@mongo:27017/?authSource=admin
-
-    # Optional credentials for MongoDB container instance and Mongo-Express
-    MONGO_USERNAME=root
-    MONGO_PASSWORD=example
-
-    # Website URL
-    # Required
-    SITE_URL=http://localhost:8080
-
-    # Mail/SMTP
-    SMTP_HOST='smtp-server'
-    SMTP_PORT='1025'
-    SMTP_NAME='local'
-    SMTP_USERNAME='team@infisical.com'
-    SMTP_PASSWORD=
-  ```
-</Accordion>
-
-<Warning>
-    The pre-populated environment variable values above are meant to be used in development only. They should never be used in production.
-</Warning>
-
-View all available [environment variables](https://infisical.com/docs/self-hosting/configuration/envars) and guidance for each.
+Start by creating a .env file at the root of the Infisical directory then copy the contents of the file linked [here](https://github.com/Infisical/infisical/blob/main/.env.example). View all available [environment variables](https://infisical.com/docs/self-hosting/configuration/envars) and guidance for each.
 
 ## Starting Infisical for development
 
@@ -72,10 +30,7 @@ docker-compose -f docker-compose.dev.yml up --build --force-recreate
 ```
 #### Access local server 
 
-Once all the services have spun up, browse to http://localhost:8080. To sign in, you may use the default credentials listed below.
-
-Email: `test@localhost.local`
-Password: `testInfisical1`
+Once all the services have spun up, browse to http://localhost:8080.
 
 #### Shutdown local server