Build prod in ionic project results in heap out of memory about webpack-sources HOT 7 CLOSED

<--- Last few GCs --->

[55076:0x104000000]   188129 ms: Scavenge 1339.6 (1422.0) -> 1339.1 (1423.0) MB, 5.6 / 0.0 ms  (average mu = 0.256, current mu = 0.201) allocation failure
[55076:0x104000000]   188147 ms: Scavenge 1339.9 (1423.0) -> 1339.4 (1423.5) MB, 6.9 / 0.0 ms  (average mu = 0.256, current mu = 0.201) allocation failure
[55076:0x104000000]   188162 ms: Scavenge 1340.1 (1423.5) -> 1339.6 (1424.5) MB, 6.0 / 0.0 ms  (average mu = 0.256, current mu = 0.201) allocation failure


<--- JS stacktrace --->

==== JS stack trace =========================================

    0: ExitFrame [pc: 0x1495cf05be3d]
    1: StubFrame [pc: 0x1495cf00d40b]
    2: ConstructFrame [pc: 0x1495cf00cfa3]
    3: StubFrame [pc: 0x1495d19605fd]
Security context: 0x35667039e6e1 <JSObject>
    4: _replaceInStringNode [0x3566556b5841] [/Users/timbru/work/ume/door-to-door-webapp/node_modules/webpack-sources/lib/ReplaceSource.js:209] [bytecode=0x3566436ae051 offset=81](this=0x356665d1f221 <Source map = 0x3566bb495919>,output=0x35...

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
 1: 0x10003b125 node::Abort() [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 2: 0x10003b32f node::OnFatalError(char const*, char const*) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 3: 0x1001a8e85 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 4: 0x1005742a2 v8::internal::Heap::FatalProcessOutOfMemory(char const*) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 5: 0x100576d75 v8::internal::Heap::CheckIneffectiveMarkCompact(unsigned long, double) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 6: 0x100572c1f v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::GCCallbackFlags) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 7: 0x100570df4 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 8: 0x10057d68c v8::internal::Heap::AllocateRawWithLigthRetry(int, v8::internal::AllocationSpace, v8::internal::AllocationAlignment) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
 9: 0x10057d70f v8::internal::Heap::AllocateRawWithRetryOrFail(int, v8::internal::AllocationSpace, v8::internal::AllocationAlignment) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
10: 0x10054d054 v8::internal::Factory::NewFillerObject(int, bool, v8::internal::AllocationSpace) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
11: 0x1007d4f24 v8::internal::Runtime_AllocateInNewSpace(int, v8::internal::Object**, v8::internal::Isolate*) [/Users/timbru/.nvm/versions/node/v10.15.0/bin/node]
12: 0x1495cf05be3d
sh: line 1: 55076 Abort trap: 6           ng build --prod "--source-map" "true" "--progress" "false"