Multitenant application server using a union file system

A multitenant system comprising:

• a memory that stores instructions;
• and
• one or more processors configured by the instructions to perform operations comprising:
• receiving a first request from a first user device associated with a first user identifier of a tenant to share an application defined using a file stored in a first layer of a union file system of a storage device, the first layer corresponding to the first user identifier;
• in response to the first request, moving the file from the first layer to a second layer of the union file system of the storage device, the second layer corresponding to the tenant;
• and
• based on the file being on the second layer of the union file system and a second user device being associated with a second user identifier of the tenant, providing access to the application to the second user device.

A non-transitory computer-readable medium that stores instructions that, when executed by one or more processors of a multitenant application server, cause the multitenant application server to perform operations comprising:

• receiving a first request from a first user device associated with a first user identifier of a tenant to share an application defined using a file stored in a first layer of a union file system of a storage device, the first layer corresponding to the first user identifier;
• in response to the first request, moving the file from the first layer to a second layer of the union file system, the second layer corresponding to the tenant;
• and
• based on the file being on the second layer of the union file system and a second user device being associated with a second user identifier of the tenant, providing access to the application to the second user device.