Register your SMART app.
Make the launch.

{
  "resourceType": "Patient",
  "id": "synthetic-patient-1",
  "name": [{ "family": "Example", "given": ["Avery"] }],
  "gender": "unknown"
}

{
  "resourceType": "Practitioner",
  "id": "synthetic-practitioner-1",
  "active": true,
  "name": [{ "family": "Clinician", "given": ["Morgan"] }]
}

{
  "capabilities": [
    "launch-ehr",
    "client-public",
    "sso-openid-connect",
    "context-ehr-patient",
    "permission-patient",
    "permission-user",
    "permission-v2"
  ],
  "code_challenge_methods_supported": [
    "S256"
  ],
  "scopes_supported": [
    "launch",
    "openid",
    "fhirUser",
    "launch/servicerequest",
    "patient/Patient.r",
    "patient/Patient.rs",
    "user/Patient.rs",
    "user/Practitioner.r",
    "user/Practitioner.rs",
    "user/PractitionerRole.rs",
    "user/Organization.rs",
    "user/Location.rs",
    "patient/Appointment.rs",
    "user/Appointment.rs",
    "patient/Encounter.rs",
    "user/Encounter.rs",
    "patient/Condition.rs",
    "user/Condition.rs",
    "patient/AllergyIntolerance.rs",
    "user/AllergyIntolerance.rs",
    "user/ServiceRequest.r",
    "patient/MedicationRequest.rs",
    "patient/FamilyMemberHistory.rs",
    "user/DocumentReference.c",
    "user/Media.c"
  ]
}