diff --git a/Dockerfile b/Dockerfile
index 544ad4b7..d9db89b4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,10 @@
 FROM mcr.microsoft.com/dotnet/sdk:6.0-alpine AS build
-
-COPY ./src ./src
-
 WORKDIR /src
+
+COPY ./src/LocalTest.csproj .
 RUN dotnet restore LocalTest.csproj
-RUN dotnet build LocalTest.csproj -c Release -o /app_output
+
+COPY ./src .
 RUN dotnet publish LocalTest.csproj -c Release -o /app_output
 
 FROM mcr.microsoft.com/dotnet/aspnet:6.0-alpine AS final
diff --git a/src/Controllers/HomeController.cs b/src/Controllers/HomeController.cs
index 539e9e49..d09aed87 100644
--- a/src/Controllers/HomeController.cs
+++ b/src/Controllers/HomeController.cs
@@ -456,7 +456,7 @@ private void CreateJwtCookieAndAppendToResponse(string identityCookie, int altin
                 SecurePolicy = CookieSecurePolicy.None,
                 IsEssential = true,
                 Domain = _generalSettings.Hostname,
-                Expiration = new TimeSpan(0, 1337, 0)
+                MaxAge = TimeSpan.FromDays(365),
             };
             CookieOptions partyCookieOptions = partyCookieBuilder.Build(HttpContext);
             cookieManager.AppendResponseCookie(
@@ -474,7 +474,7 @@ private void CreateJwtCookieAndAppendToResponse(string identityCookie, int altin
                 SecurePolicy = CookieSecurePolicy.None,
                 IsEssential = true,
                 Domain = _generalSettings.Hostname,
-                Expiration = TimeSpan.MaxValue,
+                MaxAge = TimeSpan.FromDays(365),
             };
             CookieOptions userSelectCookieOptions = cookieBuilder.Build(HttpContext);
             cookieManager.AppendResponseCookie(
diff --git a/src/Services/LocalApp/Implementation/LocalAppHttp.cs b/src/Services/LocalApp/Implementation/LocalAppHttp.cs
index 0d2ef283..ad84ed02 100644
--- a/src/Services/LocalApp/Implementation/LocalAppHttp.cs
+++ b/src/Services/LocalApp/Implementation/LocalAppHttp.cs
@@ -60,7 +60,7 @@ public LocalAppHttp(IOptions<GeneralSettings> generalSettings, IHttpClientFactor
                 return await _httpClient.GetStringAsync($"{appId}/api/v1/applicationmetadata?checkOrgApp=false");
             });
 
-            return JsonSerializer.Deserialize<Application>(content, JSON_OPTIONS);
+            return JsonSerializer.Deserialize<Application>(content!, JSON_OPTIONS);
         }
 
         public async Task<TextResource?> GetTextResource(string org, string app, string language)
@@ -71,7 +71,7 @@ public LocalAppHttp(IOptions<GeneralSettings> generalSettings, IHttpClientFactor
                 return await _httpClient.GetStringAsync($"{org}/{app}/api/v1/texts/{language}");
             });
 
-            var textResource = JsonSerializer.Deserialize<TextResource>(content, JSON_OPTIONS);
+            var textResource = JsonSerializer.Deserialize<TextResource>(content!, JSON_OPTIONS);
             if (textResource != null)
             {
                 textResource.Id = $"{org}-{app}-{language}";
diff --git a/src/Services/Register/Implementation/PartiesWrapper.cs b/src/Services/Register/Implementation/PartiesWrapper.cs
index 4ad19ce4..ac0611c8 100644
--- a/src/Services/Register/Implementation/PartiesWrapper.cs
+++ b/src/Services/Register/Implementation/PartiesWrapper.cs
@@ -53,10 +53,10 @@ public async Task<int> LookupPartyIdBySSNOrOrgNo(string lookupValue)
         }
 
         /// <inheritdoc />
-        public async Task<List<Party>> GetPartyList(List<int> partyIds)
+        public async Task<List<Party?>> GetPartyList(List<int> partyIds)
         {
             var data = await _testDataService.GetTestData();
-            List<Party> filteredList = new List<Party>();
+            List<Party?> filteredList = new List<Party?>();
             foreach (int partyId in partyIds.Distinct())
             {
                 Party? party = data.Register.Party.TryGetValue(partyId.ToString()!, out var value) ? value : null;
diff --git a/src/Services/TestData/TestDataService.cs b/src/Services/TestData/TestDataService.cs
index 8a4e439b..aca43d46 100644
--- a/src/Services/TestData/TestDataService.cs
+++ b/src/Services/TestData/TestDataService.cs
@@ -22,7 +22,7 @@ public TestDataService(ILocalApp localApp, IOptions<LocalPlatformSettings> setti
 
     public async Task<TestDataModel> GetTestData()
     {
-        return await _cache.GetOrCreateAsync("TEST_DATA",
+        return (await _cache.GetOrCreateAsync("TEST_DATA",
             async (entry) =>
             {
                 entry.SlidingExpiration = TimeSpan.FromSeconds(5);
@@ -43,6 +43,6 @@ public async Task<TestDataModel> GetTestData()
                 }
 
                 return await TestDataDiskReader.ReadFromDisk(_settings.LocalTestingStaticTestDataPath);
-            });
+            }))!;
     }
 }